Aug 30, 2013 11:28 PM

I was field walking a few weeks ago and literally stumbled over this strange item half-buried in the chalky soil. My immediate concern was that it was an old Mills grenade left over from Home Guard practice - it's palm-sized, so I took several smart steps backwards. Closer investigation showed it to be a mineral/stone and not metal, so I'm stumped as to what it might be. Some pics here - hoping someone can give me a clue as to what I've found...

Thanks Mike - I think that nails it, there are quite a few similar on the web - I am quite tempted to have it professionally cut to see the interior... Although a big part of me thinks that would be just a bit wrong, as the nodule has taken so long to get this stage...